EP1925962A1 - Stereo-Video-Mikroskopsystem - Google Patents

Stereo-Video-Mikroskopsystem Download PDF

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Publication number
EP1925962A1
EP1925962A1 EP06024158A EP06024158A EP1925962A1 EP 1925962 A1 EP1925962 A1 EP 1925962A1 EP 06024158 A EP06024158 A EP 06024158A EP 06024158 A EP06024158 A EP 06024158A EP 1925962 A1 EP1925962 A1 EP 1925962A1
Authority
EP
European Patent Office
Prior art keywords
video microscope
stereo video
stereo
control unit
display unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06024158A
Other languages
English (en)
French (fr)
Inventor
Joachim Luber
Steffen-Volker Janik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Swiss Medical Technology GmbH
Original Assignee
Swiss Medical Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swiss Medical Technology GmbH filed Critical Swiss Medical Technology GmbH
Priority to EP06024158A priority Critical patent/EP1925962A1/de
Priority to PCT/EP2007/010095 priority patent/WO2008061738A1/en
Priority to US12/515,943 priority patent/US8791995B2/en
Priority to JP2009537539A priority patent/JP2010510549A/ja
Priority to EP07846726A priority patent/EP2084566A1/de
Publication of EP1925962A1 publication Critical patent/EP1925962A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/18—Arrangements with more than one light path, e.g. for comparing two specimens
    • G02B21/20—Binocular arrangements
    • G02B21/22—Stereoscopic arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/0004—Microscopes specially adapted for specific applications
    • G02B21/0012—Surgical microscopes

Definitions

  • the invention relates to a stereo video microscope system and in particular to a stereo video microscope system to be employed by medical professionals and especially dentists and surgeons.
  • stereo microscopes for assisting medical professionals in performing such tasks as medical surgeries, examinations, treatments and the like.
  • the medical professional using a conventional stereo microscope has to look through the eye-pieces thereof in order to study a region of interest. This, however, is often very inconvenient, because of the awkward positions the medical professional has to place himself in, in order to be able to look through the eye-pieces of the stereo microscope and to work with his hands within the region of interest. Obviously, such a situation is rather dissatisfying for the medical professional or the patient being examined and/or treated.
  • the position of the stereo basis of a stereo microscope is of major importance for displaying the stereo image on a display unit as well for actions of the medical professional which are triggered by what the medical professional perceives on the display unit.
  • conventional stereo microscopes with a fixed stereo base have the problem that a change of the position of the microscope can lead to a rotation of the image and even to the image being displayed upside down. Obviously, this leads to an exchange of the two stereo channels on the display unit.
  • the medical professional i.e. the viewer, will perceive such rotations and/or exchanges in that an actual heightening is displayed as a depression and vice versa. Again, such a situation is rather confusing and, consequently, dissatisfying for the medical professional using a conventional stereo microscope.
  • using a mirror in combination with a stereo microscope involves additional challenges in that any light coming from the parts of the dental region of a patient being examined with a mirror will experience one additional interaction with the mirror (i.e. a reflection) before entering the stereo microscope.
  • Conventional stereo microscopes do not have any means for compensating for such an effect.
  • the size of the field of view of a stereo microscope depends among other factors on the chosen magnification. For instance, in a zoom system with a ratio of 4:1 the diameter of the field of view would change e.g. from 100 mm to 25 mm.
  • the region illuminated by the internal lighting of the stereo microscope is fixed. This has the consequence that in conventional stereo microscopes only for a special setting the actual field of view coincides with the area illuminated by the internal lighting of the microscope.
  • the field of view and the area illuminated by the internal lighting of the microscope do not match such that either only a part of the actual field of view gets illuminated or that the area illuminated by the internal lighting of the microscope is larger than the actual field of view. In the latter case only a small part of the light emitted by the internal lighting of the microscope is actually "used", whereas the bulk thereof is being wasted.
  • the internal lighting of a conventional stereo microscope generally illuminates the field of view thereof in a fixed angular relationship with respect to the optical axis of the stereo microscope.
  • a medical professional and especially a dentist often will need to examine regions which are difficult to illuminate and, thus, to image by conventional stereo microscopes having a fixed internal lighting. Obviously, this situation is dissatisfying for the medical professional.
  • Microscopes employed in the medical field are often used together with an external light source each being mounted to a separate support system.
  • the separate support systems of the microscope and the external light source are prone to colliding and interfering with each other and, consequently, it is often very difficult to manipulate and adjust these separate elements for providing an optimal internal and external illumination. Again, such a situation is rather dissatisfying for the medical professional using a conventional microscope together with an external light source.
  • the object of the present invention is to provide a stereo video microscope system overcoming or at least mitigating the problems associated with conventional systems as outlined above.
  • the above object is achieved by a stereo video microscope system according to claim 1.
  • the stereo video microscope system according to the present invention comprises a stereo video microscope having two output channels for providing stereo image data and including an internal lighting, a display unit having two input channels for receiving and displaying stereo image data and a control unit.
  • the control unit is operably connected to the stereo video microscope and the display unit such that the control unit can control the operation of the stereo video microscope and the display unit and the flow of stereo image data between the two output channels of the stereo video microscope and the two input channels of the display unit.
  • the stereo video microscope system 10 comprises a stereo video microscope 11 which in addition to its own internal lighting (not shown) is embedded within an external lighting unit 12.
  • a stereo video microscope 11 which suitably can be employed in the stereo video microscope system 10 according to the present invention is described, for instance, in EP 05 026 775 (assigned to the same applicant as the present application).
  • the stereo video microscope 11 and the external lighting unit 12 are mounted to a common support structure 16.
  • the support structure 16 is shown in figure 1 as fixedly mounted to a base 18 resting on the floor, the support structure 16 equally could be fixedly mounted to a wall or a ceiling. Also, the support structure 16 could be resting on a movable base 18 such that the stereo video microscope system 10 according to the present invention can be moved to any desired location.
  • an appropriate support structure 16 could be made out of a variety of elements, such as support rods or telescope arms, hinged connections connecting these elements, stabilizing elements and the like. Therefore, the details of these elements will not be described in any greater detail herein.
  • the display unit 14 is preferably mounted to the support structure 16, e.g. to a further arm thereof.
  • the stereo video microscope 11 and the display unit 14 should be connected e.g. to two separate arms of the support structure 16 such that these two arms can be rotated freely with respect to the support structure 16 without interfering with each other. For instance, this can be readily achieved by positioning the arm connecting the stereo video microscope 11 to the support structure 16 and the arm connecting the display unit 14 to the support structure 16 at different heights thereof.
  • the stereo video microscope 11 is connected to a control unit (not shown) which in turn is connected to the display unit 14.
  • a control unit could be integrated into the stereo video microscope 11 or external thereto.
  • the control unit is configured to allow for user input to control the stereo video microscope 11 and/or the display unit 14 and to manage the flow of stereo image data from the stereo video microscope 11 to the display unit 14.
  • the stereo image data acquired by the two channels of the stereo video microscope 11 is transferred via the control unit to the display unit 14 and displayed in an appropriate form on a screen thereof.
  • an auto-stereoscopic or a stereoscopic monitor represent viable embodiments of the display unit 14 capable of displaying the stereo image data provided by the two channels of the stereo video microscope 11 in an appropriate manner.
  • Auto-stereoscopic and stereoscopic monitors display a left eye image and a right eye image, which are transmitted to the brain of the viewer for processing.
  • several techniques have been developed to ensure that each eye sees the image it is supposed to see, i.e. the left eye of the viewer sees the left eye image and the right eye sees the right eye image.
  • the glasses "shutter" on and off, alternatively showing the left eye only the left eye image and the right eye only the right eye image.
  • the shutter switches on and off so quickly that the viewer's brain "fuses" the two images into a single stereoscopic image such that a three-dimensional stereo image is perceived.
  • a similar effect can be provided in the case of auto-stereoscopic monitors by techniques known, for instance, as parallax barrier or lenticular plate.
  • the external lighting unit 12 is connected to and controllable by the control unit.
  • the external lighting unit 12 preferably, includes a plurality of light emitting diodes (LEDs) which e.g. could be arranged as a ring of LEDs centered around the stereo video microscope 11 and a reflector for illuminating the field of view of the stereo video microscope 11 in the direction of the patient 20.
  • LEDs light emitting diodes
  • the LEDs of the external lighting unit 12 can be driven and controlled by the control unit.
  • an appropriate interface between the external lighting unit 12 and the control unit can be provided.
  • the control unit should allow for modes of operation providing only light from the external lighting unit 12, only light from the internal lighting of the stereo video microscope 11 as well as a combination of light from the external lighting unit 12 and the internal lighting of the stereo video microscope 11. These operation modes can be selected by means of the control unit connected to the stereo video microscope 11 and the external lighting unit 12.
  • control unit of the stereo video microscope system 10 comprises means or is configured for performing an image rotation and/or exchanging the two output channels provided by the stereo video microscope 11 for certain positions of the stereo video microscope 11 such that it is assured that the stereo image displayed on the display unit 14 is always upright and not laterally reversed (i.e. "left is left and right is right”).
  • the image rotation can e.g. be provided by an appropriately configured software algorithm implemented within the control unit which processes the stereo image data provided by the two channels of the stereo video microscope 11.
  • the image rotation can be achieved by means of a mechanical rotation of the stereo video microscope 11 itself about its optical axis under control of the control unit.
  • control unit is further configured to perform an image rotation and/or an exchange of the two stereo channels upon corresponding instructions issued by a user, e.g. by means of a switch or a keypad connected to the control unit or voice commands.
  • control unit initiates an image rotation and/or an exchange of the two stereo channels automatically if a positioning sensor (not shown) indicates that the stereo video microscope 11 is located in a position relative to the object of interest, e.g. the patient 20, which necessitates such an action by the control unit in order to provide for an upright and not laterally reversed display of the stereo image data by the display unit 14.
  • a positioning sensor not shown
  • control unit is furthermore configured or comprises means for providing for an appropriate image rectification in case a mirror is used in combination with the stereo video microscope system 10.
  • the image rectification procedure preferably involves producing respective mirror images of the images provided by the two channels of the stereo video microscope 11 and exchanging the two channels of the display unit 14.
  • the control unit is configured to perform such an image rectification upon being provided with the information that a mirror is used, such as by corresponding instructions issued by a user, by means of a switch or a keypad connected to the control unit or voice commands.
  • the control unit is configured to automatically establish that a mirror is used. This can be accomplished e.g.
  • control unit is configured to adjust the size of the area illuminated by the internal lighting of the stereo video microscope 11 and/or the external lighting unit 12 to the size of the actual field of view of the stereo video microscope 11.
  • Such an adjustment of the size of the illuminated area by means of the control unit provides for a better efficiency in case the lighting power of the internal lighting of the stereo video microscope 11 and/or the external lighting unit 12 are kept constant.
  • the latter case is beneficial and preferred due to the reduced energy consumption and, thus, a prolonged lifetime of the internal lighting of the stereo video microscope 11 and/or the external lighting unit 12.
  • the adjustment of the area illuminated by the internal lighting of the stereo video microscope 11 and/or the external lighting unit 12 to the actual field of view of the stereo video microscope 11 no light energy is being lost or wasted.
  • control unit is configured to continuously adjust the rate of changing the focus distance, i.e. the focus speed, depending on the chosen magnification of the stereo video microscope 11.
  • control unit is configured to automatically select a higher focus speed for lower magnifications than for higher magnifications of the stereo video microscope 11. For instance, for a magnification of 10x the focus speed could be twice as large as for a magnification of 20x. This could be achieved e.g.
  • FS MG FS MAX - FS MAX - FS MIN MG MAX - MG MIN * MG - MG MIN , wherein FS MAX , FS MIN , MG MAX and MG MIN are the maximal focus speed, the minimal focus speed, the maximal magnification and the minimal magnification of the stereo video microscope 11, respectively.
  • FS MAX , FS MIN , MG MAX and MG MIN are the maximal focus speed, the minimal focus speed, the maximal magnification and the minimal magnification of the stereo video microscope 11, respectively.
  • the relation between the focus speed and the magnification preferably can be adjusted by the user via the control unit or the stereo video microscope 11 in order to best suit his needs.
  • control unit In case a user simultaneously adjusts the rate of changing the focus distance, i.e. the focus speed, and the magnification of the stereo video microscope 11, the control unit is configured to select the optimal respective default values of these quantities. This can be achieved e.g. by an appropriately configured software algorithm implemented in the control unit or the stereo video microscope 11 determining the direction of these simultaneous changes.
  • the stereo video microscope 11 is provided with an optical lighting port connected to the internal lighting thereof.
  • a small flexible optical fiber (not shown) is attached to the lighting port, such that the small flexible fiber can be grasped and guided by a user to provide light in regions which cannot be illuminated by the internal lighting of the stereo video microscope 11 and/or the external lighting unit 12 directly.
  • the angle between the optical axis of the stereo video microscope 11 and the symmetry axis of the internal lighting thereof can be achieved by means of an internal mirror system being user-adjustable with respect to the angle and the position of the mirror.
  • the external lighting unit 12 could be configured to be positionable or adjustable with respect to the stereo video microscope 11 in such a way, that a user could easily change the angle and the position of the light beam illuminating the field of view of the stereo video microscope.
EP06024158A 2006-11-21 2006-11-21 Stereo-Video-Mikroskopsystem Withdrawn EP1925962A1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP06024158A EP1925962A1 (de) 2006-11-21 2006-11-21 Stereo-Video-Mikroskopsystem
PCT/EP2007/010095 WO2008061738A1 (en) 2006-11-21 2007-11-21 Stereo video microscope system
US12/515,943 US8791995B2 (en) 2006-11-21 2007-11-21 Stereo video microscope system
JP2009537539A JP2010510549A (ja) 2006-11-21 2007-11-21 立体ビデオ顕微鏡システム
EP07846726A EP2084566A1 (de) 2006-11-21 2007-11-21 Stereovideo-mikroskopsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06024158A EP1925962A1 (de) 2006-11-21 2006-11-21 Stereo-Video-Mikroskopsystem

Publications (1)

Publication Number Publication Date
EP1925962A1 true EP1925962A1 (de) 2008-05-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06024158A Withdrawn EP1925962A1 (de) 2006-11-21 2006-11-21 Stereo-Video-Mikroskopsystem

Country Status (2)

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US (1) US8791995B2 (de)
EP (1) EP1925962A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3119325B1 (de) 2014-03-17 2018-12-12 Intuitive Surgical Operations, Inc. Systeme und verfahren zur steuerung der ausrichtung eines bildgebungsinstruments
US11678791B2 (en) 2019-06-03 2023-06-20 Karl Storz Se & Co. Kg Imaging system and observation method

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US20110304706A1 (en) * 2010-06-09 2011-12-15 Border John N Video camera providing videos with perceived depth
US9766441B2 (en) 2011-09-22 2017-09-19 Digital Surgicals Pte. Ltd. Surgical stereo vision systems and methods for microsurgery
US9330477B2 (en) * 2011-09-22 2016-05-03 Digital Surgicals Pte. Ltd. Surgical stereo vision systems and methods for microsurgery
US9480539B2 (en) * 2011-11-03 2016-11-01 James Ortlieb Viewing system and viewing method for assisting user in carrying out surgery by identifying a target image
US11448868B2 (en) 2020-05-07 2022-09-20 Kgg Inc Ergonomic EZ scope digital imaging system

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JP2000089123A (ja) * 1998-09-09 2000-03-31 Olympus Optical Co Ltd 手術用顕微鏡
JP2001145640A (ja) * 1999-11-19 2001-05-29 Olympus Optical Co Ltd 被検体観察装置
EP1293816A2 (de) * 2001-09-17 2003-03-19 Iekado Sibata Operationsmikroskop
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3119325B1 (de) 2014-03-17 2018-12-12 Intuitive Surgical Operations, Inc. Systeme und verfahren zur steuerung der ausrichtung eines bildgebungsinstruments
US10548459B2 (en) 2014-03-17 2020-02-04 Intuitive Surgical Operations, Inc. Systems and methods for control of imaging instrument orientation
US11678791B2 (en) 2019-06-03 2023-06-20 Karl Storz Se & Co. Kg Imaging system and observation method

Also Published As

Publication number Publication date
US20100141739A1 (en) 2010-06-10
US8791995B2 (en) 2014-07-29

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